Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5548bf43547048c…

MALICIOUS

PDF

33.1 KB Created: 2021-07-06 17:33:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: aed8d55d57722bde830ff9a406209070 SHA-1: ef6d86db557d96e9ba211cc666aa7f030f53927e SHA-256: f5548bf43547048c6a78f9facfc5ea3abb78df6a6bea672eeb425db63e283784
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The primary malicious URL identified is http://netcdn.tw/app/835599320/free-followers-for-tiktok-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a social engineering lure designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/835599320/free-followers-for-tiktok-game-hack In PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-wings-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-hack-roblox-on-mac-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/error-connecting-pipe-3-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-2021-hack-banners_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-ruux-robux-for-free-grantz_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/como-jugar-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-new-link-free-spin_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-jailbreak-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/hack-stats-on-roblox-game_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/ilenders-roblox-youtube-hacker_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EEF 21856 bytes
SHA-256: 1fd05c531d9ba8dbad5458d327399386e01fc3631fa118a5fd0aa7634b7733c0
font_01_sfnt_off00005ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC4 18208 bytes
SHA-256: c18dc138d3fa9ce835d1b8f2974e0da5a27744aad7601cad562b97896f2945be

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